Traction-wheel scraper.



R. SJNICHOL.

TRACTION WHEEL-SCRAPER.

APPLICATION mu) NOV. 4, 1913.

Patented Oct. 12, 1915.

2 SHEETS-SHEET l- R. S. NICHOL.

TRACTION WHEEL SCRAPER.

APPLICATION FIL'ED NOV. 4. I913 Patented 0015121915.

2 SHEER-SHEET 2.

am new 8 ROBERT S. NICHOL, OF BROOKING, SASKATCHEWAN, CANADA.

TRACTION-WHEEL SGRAPER.

Specification of Letters Patent.

Patented Oct. 12, 1915.

Application filed November 4, 1919. Serial No. 799,235.

To all whom it may concern:

Be it known that I, RoBnR'r S. NIoHoL, a subject of the King of GreatBritain, residing at Brooking, in the Province of Saskatchewan, Dominionof Canada, have invented certain new and useful Improvements inTraction-lVheel Scrapers; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art. to which it appertains to make and use thesame.

This invention relates to scrapers. designed for use in freeing thetreads of traction wheels'from accumulations, and has for'an object toprovide a scraper that will effectively scrape accumulations from thecleats and from between the cleats of a traction wheel tread.

A further object is to provide an extremely strong scraper that may beconveniently operated when desired, there being novel means forfacilitating the scraper rising over the cleats of the traction wheeltread without obstruction.

With the above objects in view the invention consists of certain noveldetails of construction and combination of parts hereinafter fullydescribed and claimed, it being understood that various modificationsmay be made in the minor details of construction within the scope of theappended claim.

In the accompanying drawing illustrating this invention: Figure 1 is aslde elevation of a traction wheel shown fragmentary, and equipped withmy invention. Fig. 2 is a plan view of the parts shown. in Fig. 1.

Fig. 3 is a cross sectional view on the line 33 of Fig. 2. Fig. 4 is alongitudinal sectional view on the line A4 of Fig. 2. Fig. 5 is afragmentary view in side elevation showing the scraper disposed toremove accumulations from between the cleats. Fig. 6 is a fragmentaryside elevation showing the scraper raised to inoperative position.

Referring now to the drawing in which like characters of referencedesignate similar parts, 10 designates a traction wheel having cleats 11on the tread.

In carrying out my invention I provide a horizontal frame 12 that may berigidly secured to the wheel axle 13 as shown at 14, and includes sides15 that are connected at the outer ends by a cross piece 16. Fixed tothe inside of the cross piece is a rod 17 which extends out over thewheel tread, and.

mounted in a bearing 18 on the cross piece and in a bearing 19 on therod is a shaft 20 which is provided with a central portion 21 ofsubstantially square cross section. A pair of curved arms 22 areconnected in rigid parallel relation by cross bars 23 and 24,

being hinged at the rear ends as shown at 25 to the rod 17. The arms areequipped at the free ends with a scraper blade 26. A roller 27 isjournaled in bearings 28 carried by the arms, this roller being designedto ride on the tread of the wheel and also to ride up over the cleats 11whereby the blade may scrape the tread between the cleats and be liftedover the cleats by the roller, it being understood that the blade androller are spaced apart a distance equal to the 'distance betweenadjacent cleats of the wheel. An upwardly curved arm 29 is provided atthe lower end with a square opening 30 to receive the squared portion 21of the shaft 20, the arm 29 having a notch 31 in its free end whichreceives a swivel pin 31' through which passes a pin 32 that is securedat the 'lower end to the advance cross bar24 above mentioned. A helicalspring 33 is confined on this pin between the arm 29 and said cross barwhereby upon the arm 29 being rocked downwardly by actuation of theshaft 20 the s ring will exert a yielding pressure upon the scrapersufliciently strong to hold the same in snug engagement with the wheeltread. There is a stop collar 34 secured on the end of the pin, whichstop collar is engaged by the arm 29 when the latter is rockedrearwardly with a resultant raising of the scraper to inoperativeposition above the tread of the wheel. A crank handle 35 is secured tothe end of the shaft20 and is held stationary by engagement with anotched segment 36 carried by the frame 12 whereby upon the handle beingreleased after the scraper has been rotated to operative position, thescraper will remain in this position, and conversely after the scraperhas been rocked to inoperative position, the handle when released willbe held stationary by the segment to maintain the scraper in thisposition.

In operation the scraper is normally disposed in inoperative positionand when it is necessary to remove accumulations from the wheel tread,the operator rocks the handle 35 to position the scraper blade in en- 3initial position to raise the scraper to inoperatlve positlon.

What is claimed is The combination with a traction Wheel having crosscleats, of a pivotal scraper overhanging the tread of said Wheel, saidscraper including a blade adapted to contact with and removeaccumulations from the Wheel tread, a roller carried by said scraper andspaced from said blade at a idistance substantially equal to thedistance between adjacent cleats of said wheel, said roller riding uponthe tread and riding over said cleats to position said blade inengagement with said cleats and lift said blade over said cleats, meansfor holding said scraper in operative position, and means for holdingsaid scraper in released position.

In testimony whereof, I affix my signature, in the presence of twowitnesses.

ROBERT S. NICHOL.

Witnesses -SIM. JOHNSON, M. LEwAn'roN.

